JPH02278216A - Protector for cable - Google Patents

Abstract

PURPOSE:To surely protect coated optical fibers and optical fiber terminal appliances and to improve working efficiency even at the time of transporting and laying by mating and tentatively fixing cable sheaths which divide and part optical fiber terminal parts and providing means for protecting the coated optical fibers and optical fiber terminal appliances. CONSTITUTION:The coated optical fibers 2 and the optical fiber terminal appliances 5 terminated to the terminals of the coated optical fibers 2 are pinched by the cable sheaths 4 which divide and part the terminal parts and are tentatively fixed. The coated optical fibers 2 and optical fiber terminal appliances 5 exposed from the cable sheaths 4 by the termination of the composite cable 1 are, therefore, protected by the terminal parts of the cable sheath 4. The failure by the external force at the time of the transporting and laying is prevented in this way and since the handling is facilitated, the working efficiency at the time of the laying is improved.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a protection device for composite cables containing optical fiber cores, and in particular, for protection devices for cables containing optical fibers used as signal transmission lines in elevators, etc. The present invention relates to a cable protection device that protects an optical fiber core and a terminal device such as an optical connector or a converter during packaging, transportation, and installation of the protection device.

[Prior Art] Conductor wires have usually been used in control or signal composite cables used in various devices such as elevators. However, as the amount of information transmitted has increased recently, composite cables that combine optical fiber cores in addition to conductor wires have come to be used. Composite cables used in elevators are usually connected between the end of the hoistway and the car, and are either round composite cables with multiple cores arranged in a circular cross section or flat composite cables arranged flat. It had been. However, as the number of wire cores required in a composite cable increases, flat composite cables are being used because of their stability in lifting and lowering.

By the way, to connect this composite cable to the control panel,
Terminal processing is performed in advance to connect an optical fiber terminal device such as an optical connector or a converter to the terminal portion of the composite cable.

Here, the terminal processing of a conventional composite cable having an optical fiber for elevators and its connection will be explained using FIG. 4.

FIG. 4 is a perspective view showing the terminal processing state of a conventional composite cable.

In the figure, (1) is a flat composite cable that combines a -core or multi-core optical fiber core (2) and a multi-core electric wire (3) with copper wire etc. as the conductor, and has an insulating outer surface. It is sealed with a cable sheath (4). (5) is an optical fiber terminal device such as an optical connector or a converter of the optical fiber core (2) connected to the terminal part of the composite cable (1);
(6) is a connector connected to the terminal portion of the electric wire (3).

Next, the terminal processing of the conventional composite cable protection device configured as described above and the connection at the installation site are performed as follows.

First, the cable sheath (
4) is peeled off to expose the optical fiber core (2) and the electric wire (3). Next, an optical fiber terminal (5) is connected to the end of the optical fiber core (2), and a connector (6) is connected to the end of the electric wire (3).

After the terminals have been processed in this way, the composite cable (1) is passed through the duct, installed in the control panel, and connected within the panel.

However, the optical fiber core (2) and the optical fiber terminal (
5) is easily damaged by external force and may cause transmission failure, so extreme care must be taken when processing the terminal. Therefore, the terminals are usually processed in advance at a factory or the like, and then transported to the installation site and connected to a control panel or the like.

[Problem to be solved by the invention] However, the optical fiber core (2) or the optical fiber terminal (5) is easily damaged by external force, and the composite cable (
There was a risk that the optical fiber core (2) could be broken or the optical fiber terminal (5) could be damaged by routing it through the duct during the installation of (1). Furthermore, since there is a risk of damage during packaging or transportation, care must be taken in handling, which requires time and packaging costs.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cable protection device with a simple structure that reliably protects optical fiber cores and optical fiber terminal equipment during transportation and installation, and improves work efficiency. be.

[Means for Solving the Problems] A cable protection device according to the present invention protects an optical fiber core covered with a cable sheath and an optical fiber terminal equipment connected to the terminal of the optical fiber core. When processing the end of the sheath, the end is covered again with the separated cable sheath and temporarily secured to protect it.

[Function] In the present invention, the cable sheath is peeled off in advance,
After the optical fiber terminal equipment is terminated, the terminal part of the cable sheath is restored and temporarily fixed, so that the optical fiber core and the optical fiber terminal equipment at the terminal part are protected by the cable sheath, and packaging and installation are completed. Damage due to external forces is prevented during transportation to the site or during installation at the installation site.

[Embodiment] Next, an embodiment of the cable protection device of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 is a perspective view showing the terminal processing state of a composite cable protection device according to an embodiment of the present invention, FIG. 2 is a sectional view of the main part of FIG. 1, and FIG. It is a perspective view which shows the processed state of the cable sheath in a protection device. In the figure, the same reference numerals and symbols as in FIG. 4 indicate the same or equivalent parts as in the conventional example.

In the figure, (1) is a flat composite cable for elevator control and signals, which incorporates a -core or multi-core optical fiber core (2) and a multi-core electric wire (3). . (4) is an insulating cable sheath that covers the outside of the optical fiber core (2) and the electric wire (3). The cable sheath (4) is separated vertically into an upper terminal cable sheath (4a) and a lower terminal cable sheath (4b) at the terminal portion of the composite cable (1).

(5) is an optical fiber terminal such as an optical connector or converter that is connected to the end of the optical fiber core (2); (6) is a connector that is connected to the end of the electric wire (3); (7) are the optical fiber core (2), optical connector (5) and electric wire (3)
This is a tape that is sandwiched between the upper terminal cable sheath (4a) and the lower terminal cable sheath (4b) and wound around the outside thereof.

Next, the terminal processing and installation work of the cable protection device of the present invention configured as described above will be explained.

Prior to connection to a control panel, etc., in the terminal processing to connect the optical fiber terminal (5) to the optical fiber core (2),
First, the cable sheath (
4) is divided into upper and lower halves and peeled off by a predetermined distance from the optical fiber core (2) and the electric wire (3). Next, an optical fiber terminal device (5) is connected to the terminal of the optical fiber core (2). Further, a connector (6) is similarly connected to the terminal portion of the electric wire (3). At this time, the optical fiber terminal (5)
needs to be connected so as to be located inside the divided upper terminal cable sheath (4a) and lower terminal cable sheath (4b).

In addition, the connector (6) of the electric wire (3) has two terminal cable sheaths (4a) and a lower terminal cable sheath (4a) for strength.
4b); rather, if it is exposed outside the cable sheath (4), the restoring condition will be better later. Next, overlap the second end cable sheath (4a) and the lower end cable sheath (4b) in their original positions, and then remove the optical fiber core (2), optical fiber terminal (5), and electric wire (3). Store it and wrap the tape (7) around the outside to temporarily secure it.

As a result, the cable sheath (4) is almost restored, and the optical fiber core (2) and the optical fiber terminal (5) are restored.
) is protected by a cable sheath (4).

The above-mentioned terminal processing is usually completed in advance at a factory or the like, since the optical fiber core (2) and the optical fiber terminal (5) require careful handling.

Next, it is packed, transported to the installation site, and installed. At the installation site, the composite cable (1) is passed through the duct and raised up to the inside of the control panel, and then the temporarily attached tape (7
) and cut off the upper terminal cable sheath (4a) and lower terminal cable sheath (4b) near their roots,
Connect to the control panel. During this time, the optical fiber core (2
) and the optical fiber terminal (5) are the cable sheath (4)
Since it is protected by , connection work can be performed using normal work procedures.

The cable sheath (4) was divided into two parts, the second end cable sheath (4a) and the lower end cable sheath (4b), but a vertical cut was made in the cable sheath (4) to separate the optical fiber core. It is also possible to locally peel off only the part (2).

In this way, the composite cable protection device of the above embodiment is
The optical fiber core (2) constituting the composite cable (1) and the optical fiber terminal device (5), which has been previously terminated at the end of the optical fiber core (2), are separated and separated from each other on the upper side. The optical fiber core (2) and the optical fiber terminal device (5) are protected by being sandwiched between the terminal cable sheath (4a) and the lower terminal cable sheath (4b) and wrapped with tape (7).

Therefore, according to the above embodiment, the composite cable (1)
After the terminal processing, the optical fiber core (2) and optical fiber terminal (5) exposed from the cable sheath (4) are coated again with the upper terminal cable sheath (4a) and the lower terminal cable sheath (4b). Since it is temporarily secured with tape (7) and protected, it is possible to prevent damage due to external force during transportation and installation, and it is also easy to handle, reducing packaging costs and improving work efficiency during installation. .

Incidentally, although a flat composite cable was used in the above embodiment, it goes without saying that similar effects can be obtained with a round composite cable.

In addition, in the above embodiment, the optical fiber core (2) and the electric wire (
Although a composite cable with 3) has been described, when implementing the present invention, it can be similarly applied to a cable dedicated to an optical fiber core.

In the above embodiment, a protection device for a composite cable for elevators has been described, but when the present invention is implemented, it can be widely used as a protection device for composite cables for control of various devices and for signals.

Furthermore, although tape (7) is used as a temporary fixing member for the cable sheath (4), in the case of a round composite cable, a rubber band or the like may be used, and in this case, the temporary fixing member can be easily attached and removed. Become.

[Effects of the Invention] As described above, the composite cable protection device of the present invention separates an optical fiber core and an optical fiber terminal device having a terminal processed at the end of the optical fiber core by dividing and separating the terminal part. Since it is protected by being sandwiched between cable sheaths and temporarily fixed, the optical fiber core and optical fiber terminal device exposed from the cable sheath are protected by the end portion of the cable sheath by processing the ends of the composite cable. For this reason, transportation,
It is possible to prevent damage due to external force during installation, and it is also easy to handle, so packaging costs can be reduced and work efficiency during installation can be improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the terminal processing state of a cable protection device according to an embodiment of the present invention, FIG. 2 is a sectional view of the main part of FIG. 1, and FIG. 3 is a cable protection device according to an embodiment of the present invention. FIG. 4 is a perspective view showing a state in which a cable sheath is processed in the prior art, and FIG. 4 is a perspective view showing a state in which a conventional cable end is processed. In the figure, 1: composite cable 2: optical fiber core 4: cable sheath 4a: upper terminal cable sheath 4b: lower terminal cable sheath 5: optical fiber terminal device. In the drawings, the same reference numerals and the same symbols indicate the same or equivalent parts. Agent: Patent attorney Masuo Oiwa and two others Figure 1 4: Cable sheath 5: Optical fiber terminal Figure 3

Claims (1)

[Claims] An optical fiber core coated with a cable sheath, an optical fiber terminal device connected to the terminal end of the optical fiber core, and the cable sheath with the terminal part separated and separated are temporarily fastened together. A cable protection device comprising: a protection means for protecting the optical fiber core and the optical fiber terminal.